How to display the graph on my current user interface window

Question

I would like to display my graph by clicking the button "Most Active Author" and "Most Active Day" on the #WhatsApp Analyser page 2 user interface. However when I click the buttons, the graphs seem to appear on my first GUI which is #WhatsApp Analyser page 1. How can I solve this problem?

#WhatsApp Analyser page 2
def main():
    # Creating the window
    window = Tk()
    # getting screen width and height of display
    width = window.winfo_screenwidth()
    height = window.winfo_screenheight()
    # setting tkinter window size
    window.geometry("%dx%d" % (width, height))
    window.title('WhatsApp Analyser page 2')
    window.configure(bg='blue')
    # Creating a Label
    houseLabel = Label(window, text="WhatsApp Analyser", font=('Arial', 15))
    houseLabel.place(x=700, y=20)
    trainingA_button = Button(window, text=" MOST ACTIVE AUTHOR", height=2, width=35, command=ACTIVE_DAY, fg='blue')
    trainingA_button.place(x=30, y=130)
    trainingM_button = Button(window, text="    MOST ACTIVE DAY", height=2, width=35, command=ACTIVE_AUTHOR, fg='red')
    trainingM_button.place(x=30, y=180)
    testingA_button = Button(window, text="RETURN", height=2, width=35, command=root.withdraw, fg='black')
    testingA_button.place(x=30, y=230)


#WhatsApp Analyser page 1
root = Tk()
root.title("WhatsApp Analyser page 1")
root.geometry("420x230")
root.configure(bg='blue')
root.eval('tk::PlaceWindow . center')
root.resizable(False, False)

redbutton = Button(root, text='Analyse Graphs',
                   command=main, fg='blue',
                   height=2, width=35)
redbutton.place(x=88, y=20)




### Mostly Active Author in the Group
def ACTIVE_AUTHOR():
    print("MOST ACTIVE USER IN THE GROUP")
    A = plt.figure(figsize=(6, 8), dpi=70)
    #plt.figure(figsize=(8, 5))
    mostly_active = data['sender'].value_counts()
    ### Top 10 peoples that are mostly active in our Group is :
    m_a = mostly_active.head(10)
    bars = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J']
    x_pos = np.arange(len(bars))
    m_a.plot.bar()
    plt.xlabel('Sender', fontdict={'fontsize': 14, 'fontweight': 10})
    plt.ylabel('No. of messages', fontdict={'fontsize': 14, 'fontweight': 10})
    plt.title('Mostly active user in the Group', fontdict={'fontsize': 20, 'fontweight': 8})
    plt.xticks(x_pos, bars)
    #plt.show()

    canvas = FigureCanvasTkAgg(A)
    canvas.draw()
    canvas.get_tk_widget().place(x=350,y=60)

print("")



#### Mostly Active day in the Group
def ACTIVE_DAY():
    print("MOST ACTIVE DAY IN THE GROUP")
    B = plt.figure(figsize=(6,8), dpi=70)
    #plt.figure(figsize=(8, 5))
    active_day = data['Day'].value_counts()
    ### Top 10 peoples that are mostly active in our Group is :
    a_d = active_day.head(10)
    a_d.plot.bar()
    plt.xlabel('Day', fontdict={'fontsize': 12, 'fontweight': 10})
    plt.ylabel('No. of messages', fontdict={'fontsize': 12, 'fontweight': 10})
    plt.title('Mostly active day of Week in the Group', fontdict={'fontsize': 18, 'fontweight': 8})
    #plt.show()

    canvas = FigureCanvasTkAgg(B)
    canvas.draw()
    canvas.get_tk_widget().place(x=780,y=60)



root.mainloop()